Lost PDF Plugins

I used to have plugins for both PDF-XChange Viewer and PDF-XChange Editor. Somehow in recent updates I lost them both, and now have only the Chrome PDF plugin. I tried apply the NP plugins to other browsers from PDF-XChange Editor, but no plugins appeared in Vivaldi. Vivaldi is on the launch button in PDF-XChange Editor, so it clearly knows where the program is.

Chromium has stopped support of NPAPI-Plugins, adn as i know PDF-XCahnge has only NPAPI-Plugins (Plugins for Netscape/Firefox).
Current Vivaldi (with Chromium 47) does not support the type of NPAPI plugins anymore.